Trustonic
technology
SeniorUIDeveloper
Neural analysis suggests this role is
optimal for mid candidates.
“Senior UI Developer at Trustonic. Skills: React 18, TypeScript, GraphQL, AWS AppSync, Cognito, Ant Design, Jest, React Testing Library. Build Modern Web Experiences. Design, develop, and maintain a React 18-based operator portal, delivering responsive and intuitive user interfaces.”
What You'll Achieve.
deliver seamless, scalable solutions; shape the user experience across a complex SaaS platform; translating sophisticated platform capabilities into elegant, usable interfaces for customers; delivering responsive and intuitive user interfaces; ensuring consistency and reusability across the platform; deliver secure, real-time user experiences; Optimise applications for speed and scalability; Ensure applications meet high standards for responsiveness, cross-browser compatibility, and accessibility
Industry & Context.
attendance required at our office in Winnersh from time to time
What They're Looking For.
Must Have
commercial experience building production-grade React applications, Proven experience working with GraphQL APIs (AppSync, Apollo, or similar), Experience implementing authentication flows (e.g., AWS Cognito, OAuth2/OIDC), Solid experience using TypeScript in a React codebase, Deep understanding of React 18 (hooks, context, performance optimisation), skills in TypeScript, including generics and scalable typing patterns, Experience with modern tooling such as Vite or equivalent, Knowledge of state management patterns (React Query, Zustand, or similar), CSS/SCSS skills including responsive design (flexbox, grid), Experience with testing frameworks like Jest and React Testing Library, A degree in computer science, software engineering, or equivalent experience
Nice to Have
Experience with multi-tenant SaaS platforms at scale, Familiarity with AWS services (AppSync, Cognito, S3, CloudFront), Understanding of web performance optimisation techniques, Awareness of accessibility standards (WCAG), Experience working with design systems and UX best practices, AWS certification is desirable but not essential
What You'll Do.
Build Modern Web Experiences
and maintain a React 18-based operator portal
delivering responsive and intuitive user interfaces.
Create Reusable UI Components
Develop and maintain scalable component libraries using Ant Design
ensuring consistency and reusability across the platform.
Integrate with Cloud Services
Work with AWS AppSync GraphQL APIs and Cognito authentication flows to deliver secure
real-time user experiences.
Own State & Data Management
Implement efficient data-fetching and state management patterns (e.g.
Zustand) for real-time device data.
Drive Frontend Performance
Optimise applications for speed and scalability through code-splitting
and caching strategies.
Collaborate Across Teams
Partner with backend engineers on API design and schema evolution
and contribute to UX and design discussions.
Ensure Quality & Reliability
Write robust unit and integration tests using Jest and React Testing Library
and contribute to code reviews and best practices.
Champion User Experience & Accessibility
Ensure applications meet high standards for responsiveness
cross-browser compatibility
How You'll Work.
Team & Collaboration
collaborating closely with backend engineers and product teams; Collaborate Across Teams; Partner with backend engineers on API design and schema evolution; contribute to UX and design discussions; Comfortable working across teams and contributing to shared solutions
Full Job Description
Who we are... At Trustonic, we make smartphones affordable for the many, enabling global access to devices and digital finance through the world’s most secure smartphone locking technology. We partner with mobile carriers, retailers, and financiers across 30+ countries, powering device financing solutions that drive economic inclusion, profitability, and growth. We pride ourselves on living by the Trustonic culture code, a blueprint for our journey that recognises that great working environments don’t guarantee success, but bad ones almost always ensure failure. Working here, you’ll find a company that celebrates its diversity and is looking to do the right thing: for each other, the community and the planet. We believe in equal opportunities and take to heart the old African proverb ’If you only want to go fast, go alone. If you want to go far, go together’. We work flexibly when and where we’re at our best, but regardless of how you choose to work, we’ll make sure you feel like one of the team. Click [here ](https://www.trustonic.com/wp-content/uploads/2022/03/Trustonic-culture-code-Oct-2021.pdf)if you would like to find out more about Trustonic's culture code. If you would like to work in a fast-moving global technology company, with great ambition, then we’d love to hear from you! A bit about the role and what you’ll do… We’re looking for a Senior UI Developer to take a leading role in building and evolving our operator web portal for a next-generation telecoms platform. You’ll create intuitive, high-performance user interfaces that power device lifecycle management at scale—working at the intersection of frontend engineering, real-time data, and secure cloud integrations. This is a high-impact role where you’ll shape the user experience across a complex SaaS platform, collaborating closely with backend engineers and product teams to deliver seamless, scalable solutions. You’ll play a key role in translating sophisticated platform capabilities into elegant, usab
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